The following data (in thousands of dollars) have been taken from the accounting records of Karsten Corporation for the just completed year.

Sales

$990

Raw materials inventory, beginning

$70

Raw materials inventory, ending

$30

Purchases of raw materials

$100

Direct labor

$200

Manufacturing overhead

$160

Administrative expenses

$180

Selling expenses

$150

Work in process inventory, beginning

$40

Work in process inventory, ending

$70

Finished goods inventory, beginning

$150

Finished goods inventory, ending

$130

The net operating income for the year (in thousands of dollars) was:

A) $170

B) $140

C) $500

D) $200